The next beta will provide PLENTY of space to add more
I have saved a huge chunk of system memory by moving textures to GPU video memory, and I have been unable to run out, even when I add insane numbers of stuff down. As for the feature requests, I do sympathize as they are key additions, but my brain is so locked in on performance, memory and stability that it's almost impossible for me to be derailed right now
After GDC we'll see if I cannot be shunted off for a day or two.
PC SPECS: Windows 7 Ultimate 64-bit, Intel Core i7 920, NVIDIA Geforce 650GTX Ti Boost 2GB GPU, 6GB RAM